PHP - Basic: How To Find Out The Selected Item Of A Listbox?

I have a script that seems to work well to insert a bookmark into a users database when he/she is logged into the system but I am having a hard time figuring out how I would go about making a work-a-round for having an item selected before being logged in, and inserted after they have logged in or registered.

For example, I would like a user to be able to select an Item to add to bookmark whether that user is logged in/registered or not and if they are not, they would be greeted with a login/registration form and after successful login the add bookmark script would be initiated on the item previously selected.

What I've got this far:

Simple form to add bookmark:

<form name="bm_table" action="add_bms.php" method="post">
<input type="text" name="new_url" value="http://" />
<input type="submit" value="Add Bookmark"/>
</form>


Then I have the add bookmark script:

BEGIN php

$new_url = $_POST['new_url'];

try {
    check_valid_user();  //cannot get past this part since it ends the script....code below
    if (!filled_out($_POST)) {
      throw new Exception('Form not completely filled out.');
    }
    // check URL format
    if (strstr($new_url, 'http://') === false) {
       $new_url = 'http://'.$new_url;
    }

    // check URL is valid
    if (!(@fopen($new_url, 'r'))) {
      throw new Exception('Not a valid URL.');
    }

    // try to add bm
    add_bm($new_url);
    echo 'Bookmark added.';

    // get the bookmarks this user has saved
    if ($url_array = get_user_urls($_SESSION['valid_user'])) {
      display_user_urls($url_array);
    }
  }
  catch (Exception $e) {
    echo $e->getMessage();
  }

END php


Checking valid user - the portion I cannot get past in the above script:


function check_valid_user() {
// see if somebody is logged in and notify them if not
  if (isset($_SESSION['valid_user']))  {
      echo "Logged in as ".$_SESSION['valid_user'].".<br />";
  } else {
     // they are not logged in
     do_html_heading('Problem:');
     echo 'You are not logged in.<br />';
     do_html_url('login.php', 'Login');
     do_html_footer();
     exit;
  }
}



How would I go about modifying the script so that a user could fill in the form (later it would be a link...obviously they probably wouldn't be filling in a form that is log-in specific - but same concept I think)

Thanks in advance for the help!

tec4

I have a php form which shows all comments of the webpage  stored in  the database.
When i click on the edit button the corresponding 'comments' datas should appear in the textarea.

how can i do this,
pasting my piece of code


                                         $query="select *from comments order by id desc";
         
         $result=mysql_query($query);
         echo "<table width='700' align='center' border=1><tr bgcolor='green' align='center'><td><font color='black'>&nbsp;SlNo&nbsp;</font></td><td><font color='black'>Comment</font></td><td><font color='black'>&nbsp;&nbsp;Date Posted&nbsp;&nbsp;</font></td><td>Edit/Delete</td></tr></b>";
         while($row = mysql_fetch_row($result))
         {
            $d=$row['0'];
            $id=$row['0'];
            $name=$row['1'];
            $date_uploaded=$row['2'];
            
            echo    "<td>$id</td><td>$name</td>".
                "<td>$date_uploaded</td>".
                "<td><a href='edit_comments.php?id=$id'>Edit </a></td>".
                "</tr>";
         }
         
         echo   "</table>";
         
      }
      if(isset($_GET['id']))
{

   $id    = $_GET['id'];
   mysql_connect('localhost','root','') or die("Cannot connect to the Host");
mysql_select_db('sample') or die("Cannot connect to the Database !!");
   $query = "SELECT comments FROM comments_tble WHERE id = '$id' ";
   
   $result = mysql_query($query);
   $row=mysql_fetch_row($result);
   echo"<input type='text' col id='edit_comments' value='$row[0]' width='250' height='10' >";
   
   
   
   exit;
}

Say i have an array (called $myarray) and it has 10 numbers in it like this...

1
2
4
8
9
10
12
14
15
18

Now in my code, I get a number and lets say for this example it is "5".   

I need to see if that number is in the array --easy enough using in_array()--, but if it is NOT in the array, I need to find the next available number in the array that is greater than my starting number of 5  (which would be "8" in this example).

But what is the best way to find this number (i.e. 8 in this example)?

I imagine I need to somehow loop through but i'm not sure which loop is the best to use and i'm generally confusing the hell out of myself (which is frustrating because this is probably rather simple to do ).

Can anyone help guide me in the right direction? 

i have the following code:
<td width='100px'>Suppliers
                <select name="supplier">
                    <?php
                       $catcher_id = $service->getCatcherId();
                       $supplier_names = LpmAdnetworkPeer::getByName($catcher_id);
                       foreach($supplier_names as $row)
                       {
                           ?>
                           <option><?php echo $row->getName();
                           ?></option>
                    <?php     
                       }
                    ?>
                </select>
                </td>   

then on the same form i have a submit button that takes me to the next form..the problem now is how can i access the ID of the item seleted in the dropdown on the NEXT form please?
i can get the name from the list by $_POST['supplier'] on the next form
thanks

Hi all,   I am trying to validate all required fields in my contact form using php.


However I am unable to retain what was selected in my country dropdown list after it is selected and

submitted if the form had errror while validating.

I want the form to retain the value that was selected by the user to stay in the form so that users can

make necessary changes and resubmit the form   all other values stay in the form except the country dropdown.   Please help


Below is the code.

<!DOCTYPE HTML> 
<html>
<head>
<style>
.error {color: #FF0000;}
</style>
</head>
<body> 

<?php
// define variables and set to empty values
$nameErr = $emailErr = $genderErr = $websiteErr = $countryErr = "";
$name = $email = $gender = $comment = $website = "";
$country ="";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
   if (empty($_POST["name"])) {
     $nameErr = "Name is required";
   } else {
     $name = test_input($_POST["name"]);
     // check if name only contains letters and whitespace
     if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
       $nameErr = "Only letters and white space allowed"; 
     }
   }
   
   if (empty($_POST["email"])) {
     $emailErr = "Email is required";
   } else {
     $email = test_input($_POST["email"]);
     // check if e-mail address syntax is valid
     if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
       $emailErr = "Invalid email format";
     }
   }
     
   if (empty($_POST["website"])) {
     $website = "";
   } else {
     $website = test_input($_POST["website"]);
     // check if URL address syntax is valid (this regular expression also allows dashes in the URL)
     if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) {
       $websiteErr = "Invalid URL"; 
     }
   }

   if (empty($_POST["comment"])) {
     $comment = "";
   } else {
     $comment = test_input($_POST["comment"]);
   }

   if (empty($_POST["gender"])) {
     $genderErr = "Gender is required";
   } else {
     $gender = test_input($_POST["gender"]);
   }
  $country = $_POST['country'];
if (!in_array($country, array("AF",	"AX",	"AL",	"DZ",	"AS",	"AD",	"AO",	"AI",	"AQ",	"AG",	"AR",	"AM",	"AW",	"AU",	"AT",	"AZ",	"BS",	"BH",	"BD",	"BB",	"BY",	"BE",	"BZ",	"BJ",	"BM",	"BT",	"BO",	"BA",	"BW",	"BV",	"BR",	"IO",	"BN",	"BG",	"BF",	"BI",	"KH",	"CM",	"CA",	"CV",	"KY",	"CF",	"TD",	"CL",	"CN",	"CX",	"CC",	"CO",	"KM",	"CG",	"CD",	"CK",	"CR",	"CI",	"HR",	"CU",	"CY",	"CZ",	"DK",	"DJ",	"DM",	"DO",	"EC",	"EG",	"SV",	"GQ",	"ER",	"EE",	"ET",	"FK",	"FO",	"FJ",	"FI",	"FR",	"GF",	"PF",	"TF",	"GA",	"GM",	"GE",	"DE",	"GH",	"GI",	"GR",	"GL",	"GD",	"GP",	"GU",	"GT",	"Gg",	"GN",	"GW",	"GY",	"HT",	"HM",	"VA",	"HN",	"HK",	"HU",	"IS",	"IN",	"ID",	"IR",	"IQ",	"IE",	"IM",	"IL",	"IT",	"JM",	"JP",	"JE",	"JO",	"KZ",	"KE",	"KI",	"KP",	"KR",	"KW",	"KG",	"LA",	"LV",	"LB",	"LS",	"LR",	"LY",	"LI",	"LT",	"LU",	"MO",	"MK",	"MG",	"MW",	"MY",	"MV",	"ML",	"MT",	"MH",	"MQ",	"MR",	"MU",	"YT",	"MX",	"FM",	"MD",	"MC",	"MN",	"MS",	"MA",	"MZ",	"MM",	"NA",	"NR",	"NP",	"NL",	"AN",	"NC",	"NZ",	"NI",	"NE",	"NG",	"NU",	"NF",	"MP",	"NO",	"OM",	"PK",	"PW",	"PS",	"PA",	"PG",	"PY",	"PE",	"PH",	"PN",	"PL",	"PT",	"PR",	"QA",	"RE",	"RO",	"RU",	"RW",	"SH",	"KN",	"LC",	"PM",	"VC",	"WS",	"SM",	"ST",	"SA",	"SN",	"CS",	"SC",	"SL",	"SG",	"SK",	"SI",	"SB",	"SO",	"ZA",	"GS",	"ES",	"LK",	"SD",	"SR",	"SJ",	"SZ",	"SE",	"CH",	"SY",	"TW",	"TJ",	"TZ",	"TH",	"TL",	"TG",	"TK",	"TO",	"TT",	"TN",	"TR",	"TM",	"TC",	"TV",	"UG",	"UA",	"AE",	"GB",	"US",	"UM",	"UY",	"UZ",	"VU",	"VE",	"VN",	"VG",	"VI",	"WF",	"EH",	"YE",	"ZM",	"ZW"
))) {
    $country1 = "Please select your country";}
	
		
	
 
}

function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}
?>

<h2>contact us</h2>
<p><span class="error">* required field.</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"> 
   Name: <input type="text" name="name" value="<?php echo $name;?>">
   <span class="error">* <?php echo $nameErr;?></span>
   <br><br>
   E-mail: <input type="text" name="email" value="<?php echo $email;?>">
   <span class="error">* <?php echo $emailErr;?></span>
   <br><br>
   
        <legend>Country:</legend> 
        <select name="country"> 
            <option value="NULL">select</option>             
<option value="AF">Afghanistan</option>
<option value="AX">Ã…Land Islands</option>
<option value="AL">Albania</option>
<option value="DZ">Algeria</option>
<option value="AS">American Samoa</option>
<option value="AD">Andorra</option>
<option value="AO">Angola</option>
<option value="AI">Anguilla</option>
<option value="AQ">Antarctica</option>
<option value="AG">Antigua And Barbuda</option>
<option value="AR">Argentina</option>
<option value="AM">Armenia</option>
<option value="AW">Aruba</option>
<option value="AU">Australia</option>
<option value="AT">Austria</option>
<option value="AZ">Azerbaijan</option>
<option value="BS">Bahamas</option>
<option value="BH">Bahrain</option>
<option value="BD">Bangladesh</option>
<option value="BB">Barbados</option>
<option value="BY">Belarus</option>
<option value="BE">Belgium</option>
<option value="BZ">Belize</option>
<option value="BJ">Benin</option>
<option value="BM">Bermuda</option>
<option value="BT">Bhutan</option>
<option value="BO">Bolivia</option>
<option value="BA">Bosnia And Herzegovina</option>
<option value="BW">Botswana</option>
<option value="BV">Bouvet Island</option>
<option value="BR">Brazil</option>
<option value="IO">British Indian Ocean Territory</option>
<option value="BN">Brunei Darussalam</option>
<option value="BG">Bulgaria</option>
<option value="BF">Burkina Faso</option>
<option value="BI">Burundi</option>
<option value="KH">Cambodia</option>
<option value="CM">Cameroon</option>
<option value="CA">Canada</option>
<option value="CV">Cape Verde</option>
<option value="KY">Cayman Islands</option>
<option value="CF">Central African Republic</option>
<option value="TD">Chad</option>
<option value="CL">Chile</option>
<option value="CN">China</option>
<option value="CX">Christmas Island</option>
<option value="CC">Cocos (Keeling) Islands</option>
<option value="CO">Colombia</option>
<option value="KM">Comoros</option>
<option value="CG">Congo</option>
<option value="CD">Congo, The Democratic Republic Of The</option>
<option value="CK">Cook Islands</option>
<option value="CR">Costa Rica</option>
<option value="CI">Cote D'Ivoire</option>
<option value="HR">Croatia</option>
<option value="CU">Cuba</option>
<option value="CY">Cyprus</option>
<option value="CZ">Czech Republic</option>
<option value="DK">Denmark</option>
<option value="DJ">Djibouti</option>
<option value="DM">Dominica</option>
<option value="DO">Dominican Republic</option>
<option value="EC">Ecuador</option>
<option value="EG">Egypt</option>
<option value="SV">El Salvador</option>
<option value="GQ">Equatorial Guinea</option>
<option value="ER">Eritrea</option>
<option value="EE">Estonia</option>
<option value="ET">Ethiopia</option>
<option value="FK">Falkland Islands (Malvinas)</option>
<option value="FO">Faroe Islands</option>
<option value="FJ">Fiji</option>
<option value="FI">Finland</option>
<option value="FR">France</option>
<option value="GF">French Guiana</option>
<option value="PF">French Polynesia</option>
<option value="TF">French Southern Territories</option>
<option value="GA">Gabon</option>
<option value="GM">Gambia</option>
<option value="GE">Georgia</option>
<option value="DE">Germany</option>
<option value="GH">Ghana</option>
<option value="GI">Gibraltar</option>
<option value="GR">Greece</option>
<option value="GL">Greenland</option>
<option value="GD">Grenada</option>
<option value="GP">Guadeloupe</option>
<option value="GU">Guam</option>
<option value="GT">Guatemala</option>
<option value="Gg">Guernsey</option>
<option value="GN">Guinea</option>
<option value="GW">Guinea-Bissau</option>
<option value="GY">Guyana</option>
<option value="HT">Haiti</option>
<option value="HM">Heard Island And Mcdonald Islands</option>
<option value="VA">Holy See (Vatican City State)</option>
<option value="HN">Honduras</option>
<option value="HK">Hong Kong</option>
<option value="HU">Hungary</option>
<option value="IS">Iceland</option>
<option value="IN">India</option>
<option value="ID">Indonesia</option>
<option value="IR">Iran, Islamic Republic Of</option>
<option value="IQ">Iraq</option>
<option value="IE">Ireland</option>
<option value="IM">Isle Of Man</option>
<option value="IL">Israel</option>
<option value="IT">Italy</option>
<option value="JM">Jamaica</option>
<option value="JP">Japan</option>
<option value="JE">Jersey</option>
<option value="JO">Jordan</option>
<option value="KZ">Kazakhstan</option>
<option value="KE">Kenya</option>
<option value="KI">Kiribati</option>
<option value="KP">Korea, Democratic People'S Republic Of</option>
<option value="KR">Korea, Republic Of</option>
<option value="KW">Kuwait</option>
<option value="KG">Kyrgyzstan</option>
<option value="LA">Lao People'S Democratic Republic</option>
<option value="LV">Latvia</option>
<option value="LB">Lebanon</option>
<option value="LS">Lesotho</option>
<option value="LR">Liberia</option>
<option value="LY">Libyan Arab Jamahiriya</option>
<option value="LI">Liechtenstein</option>
<option value="LT">Lithuania</option>
<option value="LU">Luxembourg</option>
<option value="MO">Macao</option>
<option value="MK">Macedonia, The Former Yugoslav Republic Of</option>
<option value="MG">Madagascar</option>
<option value="MW">Malawi</option>
<option value="MY">Malaysia</option>
<option value="MV">Maldives</option>
<option value="ML">Mali</option>
<option value="MT">Malta</option>
<option value="MH">Marshall Islands</option>
<option value="MQ">Martinique</option>
<option value="MR">Mauritania</option>
<option value="MU">Mauritius</option>
<option value="YT">Mayotte</option>
<option value="MX">Mexico</option>
<option value="FM">Micronesia, Federated States Of</option>
<option value="MD">Moldova, Republic Of</option>
<option value="MC">Monaco</option>
<option value="MN">Mongolia</option>
<option value="MS">Montserrat</option>
<option value="MA">Morocco</option>
<option value="MZ">Mozambique</option>
<option value="MM">Myanmar</option>
<option value="NA">Namibia</option>
<option value="NR">Nauru</option>
<option value="NP">Nepal</option>
<option value="NL">Netherlands</option>
<option value="AN">Netherlands Antilles</option>
<option value="NC">New Caledonia</option>
<option value="NZ">New Zealand</option>
<option value="NI">Nicaragua</option>
<option value="NE">Niger</option>
<option value="NG">Nigeria</option>
<option value="NU">Niue</option>
<option value="NF">Norfolk Island</option>
<option value="MP">Northern Mariana Islands</option>
<option value="NO">Norway</option>
<option value="OM">Oman</option>
<option value="PK">Pakistan</option>
<option value="PW">Palau</option>
<option value="PS">Palestinian Territory, Occupied</option>
<option value="PA">Panama</option>
<option value="PG">Papua New Guinea</option>
<option value="PY">Paraguay</option>
<option value="PE">Peru</option>
<option value="PH">Philippines</option>
<option value="PN">Pitcairn</option>
<option value="PL">Poland</option>
<option value="PT">Portugal</option>
<option value="PR">Puerto Rico</option>
<option value="QA">Qatar</option>
<option value="RE">Reunion</option>
<option value="RO">Romania</option>
<option value="RU">Russian Federation</option>
<option value="RW">Rwanda</option>
<option value="SH">Saint Helena</option>
<option value="KN">Saint Kitts And Nevis</option>
<option value="LC">Saint Lucia</option>
<option value="PM">Saint Pierre And Miquelon</option>
<option value="VC">Saint Vincent And The Grenadines</option>
<option value="WS">Samoa</option>
<option value="SM">San Marino</option>
<option value="ST">Sao Tome And Principe</option>
<option value="SA">Saudi Arabia</option>
<option value="SN">Senegal</option>
<option value="CS">Serbia And Montenegro</option>
<option value="SC">Seychelles</option>
<option value="SL">Sierra Leone</option>
<option value="SG">Singapore</option>
<option value="SK">Slovakia</option>
<option value="SI">Slovenia</option>
<option value="SB">Solomon Islands</option>
<option value="SO">Somalia</option>
<option value="ZA">South Africa</option>
<option value="GS">South Georgia And The South Sandwich Islands</option>
<option value="ES">Spain</option>
<option value="LK">Sri Lanka</option>
<option value="SD">Sudan</option>
<option value="SR">Suriname</option>
<option value="SJ">Svalbard And Jan Mayen</option>
<option value="SZ">Swaziland</option>
<option value="SE">Sweden</option>
<option value="CH">Switzerland</option>
<option value="SY">Syrian Arab Republic</option>
<option value="TW">Taiwan, Province Of China</option>
<option value="TJ">Tajikistan</option>
<option value="TZ">Tanzania, United Republic Of</option>
<option value="TH">Thailand</option>
<option value="TL">Timor-Leste</option>
<option value="TG">Togo</option>
<option value="TK">Tokelau</option>
<option value="TO">Tonga</option>
<option value="TT">Trinidad And Tobago</option>
<option value="TN">Tunisia</option>
<option value="TR">Turkey</option>
<option value="TM">Turkmenistan</option>
<option value="TC">Turks And Caicos Islands</option>
<option value="TV">Tuvalu</option>
<option value="UG">Uganda</option>
<option value="UA">Ukraine</option>
<option value="AE">United Arab Emirates</option>
<option value="GB">United Kingdom</option>
<option value="US">United States</option>
<option value="UM">United States Minor Outlying Islands</option>
<option value="UY">Uruguay</option>
<option value="UZ">Uzbekistan</option>
<option value="VU">Vanuatu</option>
<option value="VE">Venezuela</option>
<option value="VN">Viet Nam</option>
<option value="VG">Virgin Islands, British</option>
<option value="VI">Virgin Islands, U.S.</option>
<option value="WF">Wallis And Futuna</option>
<option value="EH">Western Sahara</option>
<option value="YE">Yemen</option>
<option value="ZM">Zambia</option>
<option value="ZW">Zimbabwe</option>
</select>

    
    
    
   <span class="error">*<?php echo $country1;?></span>
   <br><br>
   Website: <input type="text" name="website" value="<?php echo $website;?>">
   <span class="error"><?php echo $websiteErr;?></span>
   <br><br>
   Gender:
   <input type="radio" name="gender" <?php if (isset($gender) && $gender=="female") echo "checked";?>  value="female">Female
   <input type="radio" name="gender" <?php if (isset($gender) && $gender=="male") echo "checked";?>  value="male">Male
   <span class="error">* <?php echo $genderErr;?></span>
   <br><br>
   
    Comment: <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>
   <br><br>
   <input type="submit" name="submit" value="Submit"> 
</form>


</body>
</html>

Edited by Ch0cu3r, 15 July 2014 - 03:37 PM.
Reformatted post